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Why is saliva more than water?

Saliva is produced by salivary glands. It keeps the mouth moist, helps with swallowing and speaking, and supports tooth protection. Its minerals help maintain tooth surfaces.

For dental trainees & teams
SMILE meets DESIGN
Medical teaching illustration: Moisture with several rolesAI-generated
Locations of major salivary glands · ducts not shown
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Moisture with several roles

Saliva coats teeth and the oral lining. It moistens food and supports swallowing, speaking and the first stages of digestion.

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Minerals for tooth surfaces

Saliva contains calcium and phosphate, among other substances. These minerals support the protection and mineral balance of enamel.

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Reduced saliva can have consequences

Persistent dry mouth can increase the risk of decay and infections. Medicines or health conditions may contribute and should be discussed.

Watch the short film Download infographic (German)

At a glance

Where does saliva come from?

From major and minor salivary glands, which release it into the mouth.

What does it do?

It supports moisture, swallowing and tooth protection through its minerals.

When does this become important?

Persistent dryness should prompt a discussion of possible causes and suitable measures.

Knowledge in motion

Explained in 36 seconds.

Three steps. Straight to the point.
Explanations are also shown on screen.

Short film (German): Why is saliva more than water?

Silent film in German · English explanations in the three views above

Often confused

Saliva or dry mouth?

Saliva is a protective body fluid. Dry mouth is a symptom whose cause can be investigated.

Quick answers
Where is saliva made?

In several major and many minor salivary glands. It enters the mouth through ducts.

Is a dry mouth normal with age?

Persistent dryness should not simply be attributed to age. Medicines or health conditions often contribute.

Can I stop medicines because of this?

Not on your own. Possible links and changes to treatment need medical or dental assessment.

At the practice

For your consultation

A question to discuss with Dr. med. dent. Niusha Barahmand Pour:

Could my dry mouth affect my teeth or oral lining?

The individual starting point comes before selecting measures.

Persistent dry mouth is worth discussing to consider possible causes.

Discuss dry mouthChoose an appointment on Doctolib
Meet Dr. med. dent. Niusha Barahmand Pour
Learning for dental trainees & teamsUnderstand clinical terms and build your knowledge

Build on the simple explanation with clinical terms, key distinctions and a knowledge question.

Salivary gland
An organ that produces and releases saliva.
Duct
A passage through which gland secretions enter the mouth.
Remineralisation
Minerals becoming incorporated again into previously demineralised hard tooth tissue.

Know the difference

Saliva is a protective fluid; persistent dry mouth is a symptom with possible underlying causes.

Knowledge questionWhat does saliva do?

This question supports learning. It does not assess personal symptoms.

  1. It supports moisture and mineral supply to teeth.
  2. It replaces the mechanical removal of plaque.
  3. It protects teeth only while eating.
Show answer and explanation

It supports moisture and mineral supply to teeth.

Saliva supports many functions. Regular cleaning remains necessary.

Sources for further learning
Related terms
Dry mouth Remineralisation Oral microbiome
Sources and context

Editorial research: 23 October 2026. This explanation covers general principles and does not replace a personal examination. Suitable treatment is discussed following individual assessment.